CN219194533U

CN219194533U - Feeding structure of fluidized bed for producing fumed silica

Info

Publication number: CN219194533U
Application number: CN202223502246.8U
Authority: CN
Inventors: 刘建福; 吴连杰; 崔智慧; 孙嵬伟; 李强; 高海铭; 毕宝龙
Original assignee: Tangshan Sanfu Nanomaterials Co ltd
Current assignee: Tangshan Sanfu Nanomaterials Co ltd
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-06-16
Anticipated expiration: 2032-12-28

Abstract

The utility model provides a feeding structure of a fluidized bed for producing fumed silica, and relates to the technical field of chemical production. The device comprises a calciner, a feeding pipeline, a compensator and a fluidized bed, wherein a discharge hole of the calciner is connected with one end of the feeding pipeline, the other end of the feeding pipeline is connected with a feeding hole of the fluidized bed, and the compensator is arranged on the feeding pipeline. The compensator comprises a connecting pipe, a corrugated pipe, end pipes, flange plates and a pull rod, wherein the two ends of the connecting pipe are respectively connected with the corrugated pipe, the end parts of the corrugated pipe are connected with the end pipes, the end parts of the end pipes are connected with the flange plates, and the two ends of the pull rod are respectively connected to the two end pipes. And the compensator is arranged on the feed pipe to compensate the axial thermal deformation of the absorption pipeline, so that the axial movement of the feed pipe caused by the temperature difference change is avoided, the breakage of the joint of the feed pipe and the fluidized bed is prevented, and the problem of material leakage is avoided.

Description

Feeding structure of fluidized bed for producing fumed silica

Technical Field

The utility model relates to the technical field of chemical production, in particular to a feeding structure of a fluidized bed for producing fumed silica.

Background

Fumed silica is nano-scale white powder generated by hydrolysis of silicon halide in oxyhydrogen flame, is one of extremely important high-tech superfine inorganic new materials, and has the characteristics of porosity, no toxicity, no smell, no pollution, high temperature resistance and the like. Meanwhile, the chemical inertness and special thixotropic property of the fumed silica can obviously improve the tensile strength, tear resistance and wear resistance of the rubber product. Accordingly, fumed silica is widely used.

In the production of fumed silica, the fumed silica separated by the bag filter needs to be sequentially fed into a calciner and a fluidized bed for further treatment. In existing production systems, it is common to connect a pipe directly to the feed inlet of the fluidized bed for feeding. The fluidized bed body and the pipeline are different in material and are generally connected in a welding mode. The temperature of the material fed from the calciner to the fluidised bed is high, so that the temperature of the tubes is high when the production system is in operation; after stopping, the pipe temperature is reduced. The pipe is subjected to axial forces as a result of the large temperature differences between the operation and the parking. The pipeline is connected above the fluidized bed, and the pipeline is easy to deform and move axially under the action of gravity of the pipeline. In actual production, according to the detection of the pipeline, after the pipeline is used for a period of time, the end part of the pipeline is axially displaced by 20mm, and the joint of the pipeline and the fluidized bed is subjected to the problem of desoldering, so that a gap is generated. On one hand, the generation of gaps can lead to leakage of fumed silica, thereby causing product waste and environmental pollution; on the other hand, the pressure balance in the reaction system is influenced, and the normal production is influenced.

Disclosure of Invention

In view of the above, the present utility model is directed to a feeding structure of a fluidized bed for producing fumed silica, which solves the above problems.

In view of the above object, the present utility model provides a feed structure of a fluidized bed for producing fumed silica, comprising: a calciner, a feed line, a compensator and a fluidised bed; the discharge port of the calciner is connected with one end of a feed pipeline, the other end of the feed pipeline is connected with the feed port of the fluidized bed, and a compensator is arranged on the feed pipeline; the compensator comprises a connecting pipe, a corrugated pipe, end pipes, flange plates and a pull rod, wherein the two ends of the connecting pipe are respectively connected with the corrugated pipe, the end parts of the corrugated pipe are connected with the end pipes, the end parts of the end pipes are connected with the flange plates, and the two ends of the pull rod are respectively connected to the two end pipes.

Compared with the prior art, the utility model has the beneficial effects that: and the compensator is arranged on the feed pipe to compensate the axial thermal deformation of the absorption pipeline, so that the axial movement of the feed pipe caused by the temperature difference change between the operation and the stop is avoided, the breakage of the joint of the feed pipe and the fluidized bed is prevented, and the problem of material leakage is avoided. And the compensator adopted in the device not only can compensate the axial thermal deformation of the absorption pipeline, but also can compensate the radial thermal deformation of the absorption pipeline, thereby effectively preventing the crack at the joint. Therefore, the device improves the service life of the pipeline, reduces environmental pollution and improves the production yield.

Further, the compensator also comprises a fixed plate and a connecting plate, the side walls of the two end pipes are respectively connected with the fixed plates which are oppositely arranged, and the side walls of the connecting pipes are connected with the connecting plates which are oppositely arranged with the fixed plates; the pull rods are arranged in the fixed plate and the connecting plate in a penetrating way, and nuts are respectively connected with the pull rods positioned on two sides of the fixed plate in a threaded way.

Further, the number of corrugations of the corrugated tube is four.

Drawings

FIG. 1 is a schematic diagram of a feed structure of a fluidized bed for producing fumed silica according to an embodiment of the present utility model;

fig. 2 is a schematic installation view of a feed structure of a fluidized bed for producing fumed silica according to an embodiment of the present utility model.

Marked in the figure as: 1. a feed line; 2. a connecting pipe; 3. a bellows; 4. an end pipe; 5. a flange plate; 6. a pull rod; 7. a fixing plate; 8. a connecting plate; 9. a nut; 10. a fluidized bed; 11. a compensator; 12. a calciner.

Detailed Description

The present utility model will be further described in detail with reference to specific embodiments in order to make the objects, technical solutions and advantages of the present utility model more apparent.

As shown in fig. 1 and 2, a feed structure of a fluidized bed 10 for producing fumed silica according to the present utility model is composed of a feed line 1, a compensator 11, and the like.

The discharge port of the calciner 12 is connected with one end of a feed line 1, and the other end of the feed line 1 is fixedly connected with the feed port of the fluidized bed 10, generally in a welding mode. The compensator 11 is installed on the feeding line 1, and the feeding line 1 and the compensator 11 are made of the same material, and in this embodiment, a nickel-chromium-iron-based solid solution strengthening alloy (Inconel 600) is used.

The compensator 11 is composed of a connecting pipe 2, a corrugated pipe 3, an end pipe 4, a flange 5, a pull rod 6, a fixing plate 7, a connecting plate 8 and the like. The two ends of the connecting pipe 2 are fixedly connected with corrugated pipes 3 respectively, the number of the corrugations of the corrugated pipes 3 is four, and the total number of the corrugations on the compensator 11 is eight. The ends of the two corrugated pipes 3 are respectively fixedly connected with an end pipe 4. The ends of the two end pipes 4 are respectively fixedly connected with a flange plate 5, and the compensator 11 is connected to the feed pipeline 1 in a flange connection mode. The compensator 11 is arranged at a position close to the fluidized bed 10, and the specific position is correspondingly adjusted according to actual use conditions.

The side walls of the two end pipes 4 are respectively and fixedly connected with fixing plates 7 which are oppositely arranged, and the side walls of the connecting pipes 2 are fixedly connected with connecting plates 8 which are oppositely arranged with the fixing plates 7. The pull rod 6 is arranged in the fixed plate 7 and the connecting plate 8 in a penetrating way, two nuts 9 are respectively arranged at two ends of the pull rod 6, the two nuts 9 are respectively positioned at two sides of the fixed plate 7, and the nuts 9 are connected to the pull rod 6 in a threaded way. The number of the pull rods 6, the matched fixing plates 7 and the connecting plates 8 is adjusted according to the use condition, in the embodiment, the number of the pull rods 6 is three, and the pull rods 6 are uniformly distributed along the circumferential direction of the connecting pipe 2 at equal intervals.

Therefore, the compensator 11 is arranged on the feeding pipeline 1 to compensate the axial thermal deformation of the absorption pipeline, so that the axial movement of the feeding pipeline 1 caused by the temperature difference change is avoided, the fracture of the joint of the feeding pipeline 1 and the fluidized bed 10 is prevented, and the problem of material leakage is avoided. And the compensator 11 adopted in the device not only can compensate the axial thermal deformation of the absorption pipeline, but also can compensate the radial thermal deformation of the absorption pipeline, effectively prevents the generation of cracks at the joint, and prolongs the service life of the feeding pipeline 1.

The embodiments of the utility model are intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omission, modification, equivalent replacement, improvement, etc. of the present utility model should be included in the scope of the present utility model.

Claims

1. A feed structure for a fluidized bed for producing fumed silica, comprising: a calciner, a feed line, a compensator and a fluidised bed; it is characterized in that the method comprises the steps of,

the discharge port of the calciner is connected with one end of a feed pipeline, the other end of the feed pipeline is connected with the feed port of the fluidized bed, and a compensator is arranged on the feed pipeline; the compensator comprises a connecting pipe, a corrugated pipe, end pipes, flange plates and a pull rod, wherein the two ends of the connecting pipe are respectively connected with the corrugated pipe, the end parts of the corrugated pipe are connected with the end pipes, the end parts of the end pipes are connected with the flange plates, and the two ends of the pull rod are respectively connected to the two end pipes.

2. The feeding structure of a fluidized bed for producing fumed silica according to claim 1, wherein the compensator further comprises a fixing plate and a connecting plate, the side walls of the two end pipes are respectively connected with the fixing plates which are oppositely arranged, and the side walls of the connecting pipes are connected with the connecting plates which are oppositely arranged with the fixing plates; the pull rods are arranged in the fixed plate and the connecting plate in a penetrating way, and nuts are respectively connected with the pull rods positioned on two sides of the fixed plate in a threaded way.

3. The feeding structure of a fluidized bed for producing fumed silica according to claim 1, wherein the number of corrugations of the corrugated tube is four.